LT1941_15 datasheet(2/24 Pages) LINER

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LT1941

1941fb

The

l denotes the speciﬁcations which apply over the full operating temperature

range, otherwise speciﬁcations are at TA = 25°C. VIN, VBIAS1, VBIAS2 = 5V, VBOOST1, VBOOST2 = 8V, unless otherwise noted. (Note 2)

PIN CONFIGURATION

ABSOLUTE MAXIMUM RATINGS

VIN Pin ........................................................(–0.3V), 25V

BOOST Pin Voltage ...................................................35V

BOOST Above SW Pin...............................................25V

BIAS1, BIAS2 Pins ....................................................25V

PGOOD, 5GOOD, 12GOOD Pins.................................25V

RUN/SS, VC, FB, NFB Pins ..........................................3V

SW1, SW2 Voltage.....................................................VIN

SW3 Voltage .............................................................40V

Maximum Junction Temperature (Note 6) ............ 125°C

Operating Ambient Temperature Range

(Note 2)....................................................–40°C to 85°C

Storage Temperature Range .................. –65°C to 150°C

Lead Temperature (Soldering, 10 sec)................... 300°C

(Note 1)

TOP VIEW

FE PACKAGE

28-LEAD PLASTIC TSSOP

VIN

SW1

BOOST1

PGOOD1

VC1

FB1

PGOOD2

VC2

FB2

RUN/SS1

RUN/SS2

RUN/SS3

BIAS2

SW3

PGND

VIN

BOOST2

SW2

VIN

PGOOD3

FB3

NFB

VC3

5GOOD

12GOOD

BIAS1

TJMAX = 125°C, θJA = 25°C/W

EXPOSED PAD (PIN 29) IS GND, MUST BE SOLDERED TO PCB

ORDER INFORMATION

LEAD FREE FINISH

TAPE AND REEL

PART MARKING

PACKAGE DESCRIPTION

TEMPERATURE RANGE

LT1941EFE#PBF

LT1941EFE#TRPBF

LT1941EFE

28-LEAD PLASTIC TSSOP

–40°C to 85°C

LEAD BASED FINISH

TAPE AND REEL

PART MARKING

PACKAGE DESCRIPTION

TEMPERATURE RANGE

LT1941EFE

LT1941EFE#TR

LT1941EFE

28-LEAD PLASTIC TSSOP

–40°C to 85°C

Consult LTC Marketing for parts speciﬁed with wider operating temperature ranges.

For more information on lead free part marking, go to: http://www.linear.com/leadfree/

For more information on tape and reel speciﬁcations, go to: http://www.linear.com/tapeandreel/

ELECTRICAL CHARACTERISTICS

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

Minimum Operating Voltage

3.3

3.5

VIN Quiescent Current

Not Switching

3.5

BIAS1 Quiescent Current

Not Switching

7.5

BIAS2 Quiescent Current

Not Switching

1.6

2.2

Shutdown Current

VRUNSS1,2,3 = 0V

μA

Reference Voltage Line Regulation

5V < VIN < 25V

0.01

%/V

VC Source Current

VC = 0.6V

100

μA

VC Sink Current

VC = 0.6V

100

μA

VC Clamp Voltage

1.7

Switching Frequency

0.9

1.1

1.35

MHz

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